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    <script>
        // 1.Object.is 判断两个值是否完全相等
        // console.log(Object.is(120,120)) // ===
        // console.log(Object.is(NaN,NaN))
        // console.log(NaN === NaN)

        // 2.Object.assign 对象的合并
        // const config1 = {
        //     host: 'localhost',
        //     port: 3306,
        //     name: 'root',
        //     pass: 'root',
        //     test: 'test'
        // }
        // const config2 = {
        //     host: 'http://atguigu.com',
        //     port: 33060,
        //     name: 'atguigu.com',
        //     pass: 'iloveyou',
        //     test2: 'test2'
        // }
        // console.log(Object.assign(config1,config2));

        // 3.object.setPrototypeOf 设置原型对象  object.getPrototypeOf
        const school = {
            name:'尚硅谷'
        }
        const cities = {
            xiaoqu:['北京','上海','深圳']
        }

        Object.setPrototypeOf(school,cities)
        console.log(Object.getPrototypeOf(school))
        console.log(school)
    </script>
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